Hard shell, insulated core

Rooflights for flat roofs

Rooflights for flat roofs: Hard shell, insulated core

Letting sunshine and moonlight in but keeping heat and cold out: alwitra rooflights are available in single-, double-, triple- and multi-shell versions and always feature additional thermal insulation properties. Moreover, they ensure good light diffusion with low loss of light. Another reassuring fact: the standard-fitted burglary-resistant screw system gives thieves an extra hard time.

Advantages of alwitra rooflights

Ensuring both good thermal insulation and excellent room illumination
Ideal light diffusion with low loss of light
Maximum protection against burglars
  • Double-shell rooflight
  • Made of two domed, extruded PMMA plastic shells
  • Acrylic glass, providing for particularly high transparency, impact-resistance, and UV-resistance
  • U-value of 2.68 [W/m²K]

  • Triple-shell rooflight
  • Made of three curved extruded PMMA plastic shells
  • Made of two opal shells and one middle clear shell (optional: 3 clear shells)
  • U-value of 1.70 [W/m²K]

  • Multi-shell rooflight
  • Made of one transparent domed PMMA plastic shell, a transparent domed SPC panel and an opal acrylic middle shell.
  • Excellent thermal insulation properties, U-value of 1.23 [W/m²K].
  • Ideal for buildings with increased thermal insulation requirements


Ventilation at its best.

Whether as room ventilation, natural smoke vent or roof hatch... every rooflight variety requires a vent frame. At alwitra, of course, they come delivered pre-assembled.

  • Rooflight with manual telescopic spindle
  • Hooked to brackets at the upstand and the vent frame
  • Opening with optional crank rod
  • If the side length exceeds 130 cm, a tandem version with two interconnected spindles is installed with front upstand (MAG-6)

  • Maximum comfort
  • Operation by switch or optional radio remote control
  • If the side length exceeds 130 cm, a tandem version with two electrically interconnected actuators is installed

  • Ensuring access to the roof, as required
  • Gas springs installed on both sides
  • Can be combined with manual spindle, electric opening, or NRAA